A big ol' meteroite exploded over Russia last Friday, and while the shock waves that shot…
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The object is estimated to have been about 17 m across with a mass of 7,000–10,000 tonnes when it hit atmosphere. It exploded with a force of nearly 500 kilotons of TNT –- some 30 times the energy released by the Hiroshima atomic bomb — around 15 to 20 km above the ground.

No wonder reports from Chelyabinsk, the city close to where the meteorite struck, described widespread window breakages and structural damage. [ESA]